Feeding mechanism for ring doubling and like frames



i A DAVENPORT FEED 1N6 MECHANISM FOR RI NG DOUBLING' AND LIKE FRAMES Filed Feb. 24, 1945 Inventor Patented Aug. 6, 1946 FEEDING MECHANISM FOR RING DOUBLING AND LIKE FRAMES Arthur Davenport, Macclesfield, England 3 Claims.

This invention has reference to ring doubling and like frames and refers more particularly, though not exclusively, to such frames for doubling artificial silk yarns.

In frames of this kind the yarn to be doubled is on bobbins on a creel and several ends are carried down to be doubled on a bobbin below and in order to obtain the necessary pull on the bobbins above, the yarn has usually, hitherto, been given a few turns round a roller interposed between the top and bottom bobbins, This arrangement is not wholly satisfactory in that the pull is not always even, there is a tendency for the yarn to slip over though the roller be grooved and the roller, which as will be understood is positively driven, and its gear box or mounting, occupies more space than is desirable.

This invention has for its object to provide improvements whereby the objections mentioned above can be avoided and according to the invention instead of the rollers referred to, there is used a pulley having formed in its periphery a zig-zag Y-shaped groove in which groove the yarn lies.

The invention is more particularly set forth with reference to the accompanying drawing, of which- Fig. 1 is a front elevation of a pulley mounted on its bracket.

Fig. 2 is a side view of the bracket and pulley support as seen from the right of Fig. 1.

Fig. 3 is a section of the pulley and Fig. 4 an elevation of the spindle.

As shown in the drawing a bracket 5 is mounted on a rod 6 by which the bracket and all it carries can be raised and lowered, out of and into contact with a pinion, not shown on a driving shaft below, and running the length of the frame. This bracket 5 carriers on it an idler pinion l for engaging the pinion on the driving shaft below and also engaging a pinion 8 on a shaft 9 passing through the bracket, and which, by means of this invention is much shorter than the shaft now used for carrying a long and grooved roller, the removal of the roller and the shortening of the shaft being a great convenience and advantage. The shaft 9 is rotatably mounted in a bushing and projects to one side of a circular plate l0 forming part of the bracket 5. This circular plate has a circular recess in its other face and there rotates in this recess a plate I l on the shaft 9 which is hollow, and internally screwed; the plate H has on it a peg l2. The plate H! has two arms 13 and M from which project rods parallel with the shaft 9 the top one [3 carrying a 2 grooved roller i5 and the bottom an eye 16. Detachably mounted on the shaft 9 is a pulley i1 shown in section in Fig. 3. This pulley has a face It with a hole [9 to pass over the shaft 9 and the hole 29 to engage the peg [2 so that the pulley is rotatably connected to the shaft 9 and is secured on it by a headed screw, screwed into the shaft. The pulley has a flange 22 at one side and may have one at the other, and the flat face ofthe pulley has a zig-zag groove 23 of Y section.

The yarn 24 to be doubled is drawn from the bobbins on the creel above and is wound once round the pulley from front to back, lying in the V groove 23, and is then taken off at the front over the pulley is, through the eye I6 to the bobbin below on which it is wound. In order to avoid any rubbing of the yarn the pulley i5 is to one side of the pulley ll, so that the yarn coming off does not rub on the yarn running on.

It is found that the zig-zag form of the groove of Y-shape provides a greater grip on the yarn than the old grooved roller and the doubling can proceed more rapidly and with much less trouble and fewer breakages, as the yarn easily slips into the top or V part of the groove which guides it into the stem of the Y, which, being zig-zag holds the yarn firmly until released by passing out over the V roller.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a ring doubling or like frame having a creel provided with yarn-carrying bobbins and winding bobbins, a solid one-piece yarn pulley disposed in the path of the yarn as it passes from the bobbins of the creel to the winding bobbins, said pulley having an axially flat periphery provided with a Y-shaped zig-zag groove in which the yarn is directed during its passage from one set of bobbins to the other.

2. In a ring doubling or like frame having a creel provided with yarn-carrying bobbins and winding bobbins, a solid one-piece yarn pulley disposed in the path of the yarn as it passes from the bobbins of the creel to the winding bobbins, said pulley having an axially flat periphery provided with a Y-shaped zig-zag groove in which the yarn is directed during its passage from one set of bobbins to the other, said pulley having an integral flange at one side thereof, projecting beyond the periphery of the pulley.

3. In a ring doubling or like frame having a creel provided with yarn-carrying bobbins and winding bobbins, a shaft supported for rotation in the path of the yarn as it passes from the bobbins of the creel to the winding bobbins, a plate secured on said shaft and having a stud projecting from one face thereof and, a solid one-piece yarn pulley mounted for rotation on one end of said shaft and having an axially flat periphery provided with a Y-shaped zig-zag'groove in which the yarn is directed during its passage from one set of bobbins to the other, said pulley having a complementary hole for engagement with said stud thereby to cause rotation of the pulley with said shaft, said shaft being inwardly threaded at its pulley-carrying end for the reception of fastening means for retaining the pulley in engagement with said stud.

ARTHUR DAVENPORT. 

